Connected: An Internet Encyclopedia
RFC 1112

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Network Working Group
Request for Comments: 1112
Obsoletes: RFCs 988, 1054

S. Deering
Stanford University
August 1989

### Host Extensions for IP Multicasting

### 1. STATUS OF THIS MEMO

This memo specifies the extensions required of a host implementation of the Internet Protocol (IP) to support multicasting. It is the recommended standard for IP multicasting in the Internet. Distribution of this memo is unlimited.

### Table of Contents

1. STATUS OF THIS MEMO
2. INTRODUCTION
3. LEVELS OF CONFORMANCE
4. HOST GROUP ADDRESSES
5. MODEL OF A HOST IP IMPLEMENTATION
6. SENDING MULTICAST IP DATAGRAMS

6.1. Extensions to the IP Service Interface
6.2. Extensions to the IP Module
6.3. Extensions to the Local Network Service Interface
6.4. Extensions to an Ethernet Local Network Module
6.5. Extensions to Local Network Modules other than Ethernet

7. RECEIVING MULTICAST IP DATAGRAMS

7.1. Extensions to the IP Service Interface
7.2. Extensions to the IP Module
7.3. Extensions to the Local Network Service Interface
7.4. Extensions to an Ethernet Local Network Module
7.5. Extensions to Local Network Modules other than Ethernet

APPENDIX I. INTERNET GROUP MANAGEMENT PROTOCOL (IGMP)
APPENDIX II. HOST GROUP ADDRESS ISSUES
Author's Address

Original text document

Next: 2. INTRODUCTION

Connected: An Internet Encyclopedia
RFC 1112